Investigation of open-air laser-induced chemical vapor deposition of carbon on moving optical fibers

Kinghong Kwok; Wilson K.S. Chiu

doi:10.1117/1.1947793

1 July 2005 Investigation of open-air laser-induced chemical vapor deposition of carbon on moving optical fibers

Kinghong Kwok, Wilson K.S. Chiu

Author Affiliations +

Optical Engineering, Vol. 44, Issue 7, 073801 (July 2005). https://doi.org/10.1117/1.1947793

Abstract

Using a CO₂ laser as a heat source, carbon coatings have been successfully deposited on moving optical fibers in an open-air laser-induced chemical vapor deposition (LCVD) reactor. Applications include fusion splice recoat and in-line coating of optical fibers. The relationship between operating parameters and the carbon deposition temperature and rate was investigated. Results indicate that they are strongly dependent on the laser power density and the optical fiber's traverse velocity. In order to provide a deeper understanding of the fundamental principles that govern laser heating and the carbon LCVD processes, a heat transport model was developed to predict the fiber surface temperature during deposition. The surface temperatures obtained from experiments compared well with the predicted temperature. Based on the temperature calculations, various kinetic parameters, including the activation energy E_A and pre-exponential factor k₀ for the carbon deposition process, are determined. The optical fiber signal loss at 1550 nm induced by the LCVD process is observed to be less than 10^–3 dB at low laser power density.

©(2005) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Kinghong Kwok and Wilson K.S. Chiu "Investigation of open-air laser-induced chemical vapor deposition of carbon on moving optical fibers," Optical Engineering 44(7), 073801 (1 July 2005). https://doi.org/10.1117/1.1947793

Published: 1 July 2005

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available